Centrifugal separator



Feb. 9 1926.

CENTRIFUGAL SEPARATOR Filed Ju'ne 2.1925 5 sneetssneet s Ail Y l W. C.LAUGHLIN CENTRIFUGAL sEPARATnR med June 2, 1925 5 Sneetslshee 4 t Feb. 91926.

w. c. LAUGHLIN `GNTRIFUGHM. sEPARAToR Filed June 2;'1925 l 5` speetpghetg //AY//////// W MUM @rf I V ATTORNEY I i specification.

Patented Feb.`9, 1926.

UNITED STAT-Es PA'rflaur 'OFFICE-f.

WILLIM c. LAUGHLIN, or Nnwyonx, N. Y., Assreuonro LAUGHLIN FIL'rnneoR-lPORATION, OF NEW YORK, N. Y.,

A CORPORATION or DELAWARE.

CENTRIFUGAL SEPARATOR.

Application filed .Tune 2, 1925. Seria1 No. 34,301.

To aZZ whom t may Concern;-

lie4 it known that I, WILLIAM C. LAUGHLIN, a citizen of the UnitedStates, residing at New York, in the county of New York and State of NewYork, have invented certain new' and useful Improvements in CentrifugalSeparatore, of which the following is a `Thisfi-nvention relates to theseparationof materials by centrifugal action and particularly the`separation of solids from liquids.

Special objects of thel invention are to effect continuous automaticseparation with a minimumzexpenditure 'of energy, rapidly andasthoroughly asmay be required and with 4relatively simple, entirelypractlcal apparatus. The foregoing and other objects are attainedbycertain novel features of 'construction, combinations and relations ofparts, hereinafter referred to inthe specification and llustratedin thedrawings accompa'nying-v and forming part of such specification.

The drawings illustrate the invention as embodied in 4practicalcommercial form,

with some modifications and it is to be understood that furthermodifications in structure4 may be made without departure from thespirit and scope o f the invention as hereinafter defined and broadlyclaimed'.l

.Figure 1 is a side elevation of the complete apparatus. -V

Figure2is abroken plan of one of the transmission gear sets by whichdifferential rotation of theparts is effected.

Figure B'islan enlarged vertical sectional view ofthe main portion ofthe machine vshown in Figure l( f Figure 4 is a transverse sectionalview of thel separator as taken on' substantiallyv the plane of line1-44 of Figure 3. l

Figure 5 is aperspective view of one of 5 the Scrapers for clearing theportsand Withdrawing .the separated solid matter.

Figure 6 isa further enlarged broken sectional vieu7 as on the line'6-6of Figure et, illustrating particularly the -relation of the scraper tothe other parts.

V Figure T is a transverse sectional view through the-central liquiddischarge portion of the machine as on substantially vthe plane of line7--7 of Figure 3. A

Figures 8, 9 and 10 are broken longitudinal sectional -viewsillustrating some modifications' in the structure and operation of theseparator.

In the general view, Figure 1, the rotatingcasing or bowl'of thecentrifugal is indicated 'at 1 carried by a shaft 2 journaled insuitable .'-bearings'in the gear casings 3 and 4, mounted'lat oppositesides of the casing on a base 5. lThe material to be treated is shownasfed` from tanks 6 by suitable piping 7.` into one end .of the shaft,

which latter for driving purposes is equipped with a sprocket gear`8.'A1-Water box 9y is shown surrounding the central portion vof the casingfor taking off the liquid mattei' and the solid matter is taken oli'from the annular discharge throats 10, 11 atthe ends of the casing, theremoval of such solids being facilitated by scoops 12 positioned toreceive vand carry' off such solids.

The supply end of the shafting is shown 1n `Figure 3 as having a bore 13terminating in radialports or passages 14. These ports open into anannular distributing chamber 15 whichat its outer periphery is in'communicationy by an annularfportl 16 with the primary separatingchamber 17. The front Wall V18 of this separating chamber is shown as ofconicalform and as having the discharge mouth 10 provided at the centerof the same. i

The partition 19 defining the rearward` A.vides with the companion wall18, an annular passage 21 converging toward the center and terminatingin inwardly inclined 4ports 22 opening into an annular chamber 23,.

Outwardly inclined ports 24: located at A greater radial distances fromthe center thanv the ports 22 openfrom the innermost annular chamber 23into an loutwardly divergent annular channel 25 provi-dedbetween theWallsv 26, and opening at the periphery of the bowl into the finalseparating chamber 27. The

uter Wall28 of this final separating chamber is shown as of conical form`similar to the. other end wall 18 -and as having'the secondarydischarge mouth 11 provided at the center of the same. An annular port29 provides a way froml the last separating chamber to a liquidcollecting chamber 30 which is in communication, by Way of inclinedtubes 31, with an outside collecting chamber 3 2 having nozzles 33operating 1n lll the V channel 34 of the water box, said channel havingports 35 opening from this gutter into the interior of the boX. Theliquid is water boX by piping at 36.

By the flow described the separation is started at the point of entryand is continued substantially up to the point of discharge.. Thedivergent conical wall 37 outlining theinner collecting chamber 15, byreason of its flare acts as -a distributing and separating surface,accelerating the flow o f the solids through the annular discharge 16.Further acceleration is produced bythe outward flow over the flange orpartition 19 in the primary separating chamber 17 and concentration ofthe solids in this chamber is effected by. the collection of the solidsagainst the outer cylindrical confining wall 38. With the bulk of thesolids removed, the liquid contents flow readily through the convergentannular channel 21. The ports 22 at the inner end of this channel slowup this iow sufficiently to permit entrained solid matter, not taken inthe firstchamber, to be again subjected to centrifugal action and so bewithdrawn into the outer annular portion of that chamber. From the innercollecting chamber 23 the fluid passes through the flaring channel 25into the outer peripheral portion of the second separating .chamber 27.The flow of liquidfrom this last chamber through the annular channel 29into theV inner collecting chamber 30 is sufficiently retarded to enablefiner solids which may yet be entrained at this time to be subjected tothe centrifugal action enough to force the same outward into the mainbody of col-- lectedl matter. The rate. of rotation will largely. governthis separating actionl and usually this is so fixed and the parts areso proportioned that the liquid flowing from linner chamber 3() through.tubes 31 into the the cooperative action of the casing-and a' series ofguides 40, Figures 4, 5 and 6,'inclined from the outer peripheralportion vof the separating chamber, inwardly to thel annular dischargemouth, said guides being in the form ofblades fitting closely the wallsof thc separating chamber and rotating in the same direction with but ata different rate of speed than the casing. These guides are shown asprojecting substantially. tangentially from rthe face of a fiange 41vcarried by a sleeve 42 journaled to rotate freely on the supportingshaft.

The differential rotation of this sleeve is effected in theillustrationby the gearing shown particularly in Figures 2 and 3 andshown as taken off from the bottom of the involving herringbone gears 43on the outer end of the sleeve engaged by similar gears 44 on shaft 45,which latter carries herringbone gears 46 engaged by like gears 47 onthe main shaft. As a set of the guide blades is provided in each of themain separating chambers in the present disclosure, one of these.differential geartransmissions is provided at each end of the mainshaft, indicated inFigure 1 at 3 and 4.

The differential transmissionsare so designed and operated in thepresent disclosure to drive the inwardly inclined guides at a. slowerrate of speedthan the casing, creating an overrunning effect ofthecasing which causes the separating solid matter to crowd against therear faces of the guides and be thereby deflected inwardly toward thedischarge mouth, as indicatedby the arrows in Figure 4.

-The fitting ofthe guides to the inner walls of the separatingchambers'and their rotation atdifterent speed from the separatingchambers causes them to act as Scrapers for continuously clearing thewalls o-f the Chamber. This effect is utilized to keep the annular port16 clear byproviding one or more of the blades with a' laterallyprojectinging 48l operating in said port and in lsimilar-fashion, theouter portion -V of the channel 21 at the back of the separating chamberis kept clear by annular projecting blades 49 operating in such space.

The scraping blades 49 are shown made as separate elements removably:bolted at 50 to lugs 51 on the forward sides of the mainblades 40 sothat they can be readily removed or replaced and so that they arepositionedt where they do notjinterrupt the inclination at which theyareset provides outwardly inclined passages 52 for directing lightersolids in the outer end of channel 21 outwardly into the main separatingchamber in advance of the main guides, as indicated Figure 4,` so thatsaid supplemental blades materially assist in returning entrained solidsto the mass of solids collecting in the main chamber.

One of the simple and practical methods of constructing the bowl withits various assages and partitions is shown in detail in igure 3 wherethe cylindrical body or barrel of the casing is shown carried by an in--termediate web made up of two wide flanges 53, 54 connected at theirrims to the cylindrical shell portions 38, 55 and provided at theircenters with hubs 5G, 57 keyed at 72 on-an enlarged section 58 of theshaft. The inclined outer walls of the chambers 15, 30

vandthe annular partitions 19, 26 are shown carried .by the fianges 59,60 engaged overthe hubs 56, 57 and secured by the through bolts 61.Additional bolts 62 secure the Web flanges together at a point insidethe periph- 4-eral discharge chamber 32 and bolts 63 seiiang'es 66, 67,.engaged on screw threaded shoulders 68 at the ends o-the enlargedshaft-section, serving as additional means for binding the structuretogether. The end heads 18, 28m which the discharge throats are formedare shown as bolted to the ends of the cylindrical shell sections by therows of fastenings at 69. This provides .a suitable, balanced structurewhich can be rotated safely at the speed necessary for centrifugalaction. 4

The sleeve or tubular shafting carrying the solids removing blades isshown made in sections connected by flanged joints at 70.

Various modicationscoming within the scope of the invention may be madeto adapt vthe structure tomany purposes or tothe handling of differentmaterials. Thus instead of admitting the iiuid over theface of therdistributing ange'19 as in Figure 3, the

mixture'may be admitted in back'of such liiange as indicated in Figure8, said flange .being here designated 19*1 and the inner chamber 15being shown as opening directly into the rearward portion of theseparating chamber 17 by an annular radially extensive channel 71; Thisarrangement permits the lighter substances toreverse andlow inwardlythrough the channel-21a Without having first to pass outward to the rimof the separatingchamber as in the first form.

lVith the structure modified as in Figurek '9, the inner central chamber23a is made a receiving chamber with the supply'ports 14 openingdirectly thereinto and from this chamber the ilow divides, passingoutwardly through ports 22, 24.x1 and channels 21a, 25a directly intothe separating chambers 17 a, 27 a. In this ease the side chambers 15'f,80%i are collectingv chambers for the liquid which enters by the annularports 16, 29a flowing from such chambers by tubes 311v into thedischarge chamber 32.

' Figure 10 illustrates a structural modiiication in which the materialis entered from both ends ot' the shafting and in which the action inboth separating chambers is the same'. 'Here thei'eed channel from theopposite end of the shaft is designated 13a and since the action at bothsides is the same as in Figure, to the inner chamber-23, similarreference characters have been used. In this larating chambers in theopposite en 4 tions of the same, .adischarge chamber in- Y 120 sagesfrom saidV separating chambers to said intermediate discharge chamber,includingI ca se the central chamber 23 becomes a receiver for theliquid from both sepa-rating chambers and discharges by ports 72direetly 'into the outer discharge chamber 32.

.T he action in all forms of the invention is rapld, continuous andunimpeded so that 4the machine is of high1 eiiiciency and has a greateroutput as compared'to other ma-' chines in this class. The discharge of-the heavier or solid materials from both `endsof rial from the'intermediate peripheral portion increases the capacity of the machine'and separates the liquids yfrom the lsolids so that an same.

disposition may be `made of the y dischargingV from opposite ends,

a selective separation may be effected, the' heavier grade solids beingtaken off at the iirst end of the machine -and. the --lighter gradesolids being discharged at the oppo-A site end. The inclinedguidesrotating con- .mg action and through their crowding ef feet on thematerial, aid in compactmg and -themachine and the lighter or liquidmatefI drying the material on its Way to the discharge throats.

`What is claimed is:

1. In centrifugal apparatus, a rotary casing having concentric discharge`throats at opposite ends of the 'same anda peri heral dischargeintermediate said ends, a eo lector surrounding said peripheraldischarge and supply means discharging into the casing.

2. In centriugal apparatus, a rotaryy casing having centrifugalseparating chambers in opposite end portions of the same, said .chambersprovided -With annular dischar throats, the casing having a peripherald1scharge intermediate the end chambers and provided with iiow passagesfrom said end l cs j separating chambers to said intermediatel fdischarge. y

8. In centrifugal apparait.. la rotary c'asf ing having independentlydi'schargin separating chambers in the opposite en portions of the same,a discharge chamber intermediate said end chambers and iiow pas sagesfrom said separating chambers to said f intermediate` discharge chamber.

4. In centrifugal apparatus, a rotary casing. having independentlydischargin sepnication withgboth separating chambers.

- 5. In centrifugal apparatus,.a rotary casing having separatingchambers in. the op.

posite end portions of `thesame provided with discharge throats, annularchambers oi less diameter than the separatmg chambers 1n communicationwith said separating :1a. um.

chambers, a collecting chamber intermediate said annular chambers, aperipheral disposite end portions of the same provided with dischargethroats, annular chambers of of less diameter than the-separatingchambers in communication with said separating chambers, a collectingchamber intermediate said annular chambers, a peripheral dischargechamber about said collecting chamber and fiow passages establishingcommuni-- cation between said chambers, including convergent-annularchannels extending from the separating chambers to the collectingchamber.

7. In centrifugal apparatus, a rotary casing having separated chambersin the opposite end 4po-rtions of the saine provided with dischargethroats, annular .chambers of less diameter than the separating chambersin communication with' said Vseparating chambers, a collecting chamberintermediate said annular chambers, a peripheral discharge chamber aboutsaid collecting chamber and fiow passages establishing communicationbetween said chambers, including convergent annular channels extendingfrom the separating chambers to the collecting chamber, with flowreducing ports at the inner ends of said channels.

8. In centrifugal apparatus, a shaft having a supply passage terminatingin a dischargeport or ports, a casing mounted on said shaft having areceiving chamber around said port or ports, separating chambers in saidcasing provided with discharge orifices at opposite ends of the casingand fiow passages in the casing providing coininunication between thereceiving chamber and separating chambers.

9. In centrifugal apparatus, a shaft having a supply passage terminatingin a dis-' chai-ge port or ports, a casing mounted on said shaft havinga receiving chamber around said port or ports, separating chambers insaid casing provided with discharge orifices at opposite-ends of thecasing, How

passages in the casingproviding communicationV between the receivingchamber and' separating chambers and a discharge cham ber in thercasingintermediate theseparatport or ports orifices 'at opposite ends of thecasing, flow l passages in the casingproviding communication between thereceiving chamber and separating chambers, a discharge chamber in thecasing intermediate the separating chambers, incon'imunication with thelatter and having a discharge -port or ports at the periphery. of thecasing and an annular collecting chamber surrounding the intermediateportion' of the casing and having a communicating discharge receivingtrough surrounding the peripheral discharge port or ports of the casing.Y

11. In 'centrifugal apparatus, a shaft, a casing-having an intermediateweb supporting the saine on theshaft and forming a partition definingseparating chambers in the opposite end portions of the casing, vsaidfices about the shaft and defining discharge mouths for the separatingchambers, said web further defining an annular discharge chamber at theperipheral portion of the casing between the two end separatingchambers.A

13. In centrifugal apparatus, a shaft, hub sections engaged in abuttingrelation onl said shaft and provided with flanges defining between theman annular chamber andl carrying peripheral walls, end plates secured tosaid peripheral walls provided. with discharge throats surrounding theshaft and forming in conjunction with the peripheral walls and hubfianges, centrifugal separatingchambers. L i

14. In centrifugal apparatus, a shaft, hub sections engaged in abuttingrelation on said shaft and provided with flanges defining between theman annular chamber and carrying peripheral walls-end plates secured tosaid peripheral walls provided with discharge throats surrounding theshaft and forming in conjunction with theperiplieral .walls and hubfianges, centrifugal separating chambers and fianges engaged on the hubsections and forming in conJunction with the hub flanges, annularpassages open to 'the separating chambers. ing chambers, incommunication with the.

15. In centrifugal apparatus, a shaft, hub sections engaged in abuttingrelation on said shaft and provided with fianges defining between tlieinan annular chamber and carry- ,ing peripheral-walls, end plates securedto Saidperipheral walls. rovided with dischargethroats surroun ing theshaf't and forming in conjunction with the peripheral walls and hubflanges, centrifugal separating chambers, flanges engaged onthehubsections and forming in conjunction with thehub flanges, annularpassages 'open to the separatingchambers and flanges at the ends of thehubs providing addition al vchannels in communication with theseparating cham- 16. In centrifugal apparatus, a shaft having anenlargedsection. with screw threaded shouldered portions at opposite ends of the"same, hubs engaged on said enlarged shaft section-having flangescarrying casing walls and flanges engaged on the screw threaded portionsof the shaft at the ends of the hubs and forming partitions within thecasing so formed.

@17. In centrifugal apparatus, a shaft having'an enlarged section with.screw threaded shouldered portions at' opposite ends of the same, hubsengaged on said enlarged shaft section having flanges carryingcasingwalls and flanges engaged on the screw threaded portions oftheshaft at the ends of thehubs and forming .partitions within the casingso formed and flanges on .the hubs at opposite sides ofthe hub flangesforming in conjunction with the hub flanges and the end flanges, flowpassages within the casing.

18. In centrifugal apparatus, a supporting shaft, hub sections on saidshaft having".

flanges cooperating-:to form innerand outer annular chambers, peripheralwalls carried,

by said flanges, end walls carried b said peripheral walls and `formingtherewith, in

conjunction with the hub flanges, separating chambers, said end wallshaving discharge throats surrounding the shaft and flow pas'-sagesproviding communication between the vinner and outerannularchambers and the separating chambers. l 19. 'In centrifugalapparatus, a supporting shaft, hub sections -on said shaft havingflanges cooperating to form inner and outer' annular chambers,peripheral walls carried by saidflanges, end walls carried by saidperipheral walls and yforming therewith, in conjunction with the hubflanges, separating Mchambers, `said end walls havingv discharge throatssurrounding the shaft, 'flow passages l`providing communication betweenthe inner and outer annular chambers and the separating chambers andflanges at the opposite sides of the hub flanges forming. annularchambers in communication with4 theseparating chambers.A

rating chambers and langesat the opposite sides of the hub flangesforming annular chambers in communication with the separating chambers,the shaft having a supply passage therein opening -into one of said lastnamed annular chambers.

2l. In centrifugal apparatus, a .support-1 ing shaft,i hub sections onsaid shaft having flanges cooperating to form inner and outer annularchambers, peripheral walls carried by said flanges, end walls carried bysaid peripheral walls and forming therewith, in

conjunction with the hubilanges, separating.

chambers, said end walls having discharge throats surrounding the shaft.flow passages.

providing communication between lthe inner 4andV outer annular chambersand the separating chambers'and flanges atthe opposite sides of the hubflanges forming annular. chambersin communication withthe separatingchambers, the shaft having a passage therein opening into one vof saidlast named annularv chambers, the other of .said annular chambers beingclosed to the shaft passageand provided with discharge outlets openinginto the outer annular chamber lfirst mentioned.

22. In centrifugal apparatus, hub sections having outstanding flangesdefining between them inner and outer annular chambers, peripheral wallsections carried bythe v flanges 4at the sides of lthe outer annularchamber and end walls carried by the peripheral wallshaving concentricdischarge throats.

23. In centrifugal casing having an annular chamber1 in the intermediateportion of the same, flaring apparatus, a rotary l annular channelsextending from said intermediate chamber toward the ends of the casingand separating chambers in the end portions of the 4casing incommunication with said flaring channels.

24;. .In centrifugal apparatus, a substan'v tiallyv cylindrical casing,heads applied'to: the ends of said casing Iand provided with vconcentricdischarge throats, a supply conduit opening into the'axial portion ofsaid casing and an internal web intermedi-ate the ends of the casinghaving a hub for mounting the casing on a shaft.

25. In centrifuga-l apparatus," a separating drum having separatingchambers provided with independent discharge vthroats at the oppositeends of the drum, flow passagesin the, intermediate portion of thedrumhetween said separating chambers. a discharge chamber in 'theintermediate portion of the i drum and tubular conduits interceptingthey flowy passages and opening into said discharge chamber. j

.26. In centrifugal apparatus, .a rotary drum havin g concentricdischarge throats in opposit-e ends of the same and provided withinternal annular partitions defining sepas,

. rating chambers in the opposite end portions of the drum and inclinediiow passages open to said chambers.

27. In centrifugal apparatus, a rotary drum having separat-ing chamberswith independent discharge throats in the opposite ends of the drum, anannular discharge chamber in the peripheral portion of theV drumintermediate the separating chambers and inclined annular channels, opento the separating chambers and convergent toward the intermediatesection of the drum.

28. In centrifugal apparatus, a rotary drum having separating chamberswith independent discharge throats in the opposite' ends of the drum,-anannular discharge chamber in vthe peripheral portion of the drumintermediate the separating chambers, inclined annular channelsopen tothe separating chambers and convergent toward the intermediate sect-ionof the drum and an annular collecting chamber interposed betweensaiconvergent channels and open to the same.`

29. In centrifugal apparatus, a rotary drum having' separating chamberswith independent discharge throats'in the opposite same and annular.chambers in the interends of the drum, an annular x discharge chamber inthe` peripheral .portion ofl theI drum intermedi-ate the separatingchambers, inclined annular channels open to the separating chambers andconvergent toward the intermediate section of the drum, an annuylarcollecting chamber interposed between said convergent channels and opentothe mediate axial portion of the drum open to the end separatingchambers. f

30. In centrifugal apparatus, a rotary drum having separating chamberswith independent discharge throats in the opposite ends of the drum, anannular discharge chamber in the peripheral' portion of the drumintermediate the separating chambers, inclined annular channelsopen tothe separating chambers and convergent toward the intermediate sectionof the drum, an annular collecting chamber interposed between saidconvergent channels and open to the same, annular chambers in theintermediateV axial portion of the drum open to, the end separatingchambers, a shaft supporting the ydrum and having a supply passageopening into one of said axial annular chambers and connections from theother axial chamber opening into the discharge chamber.l

- 31. In centrifugal apparatus, a, rotary drum having separatingchambers in the end portions of the same provided with independentconcentric discharge throatsin the opposite ends -of the ydrum andvannular chambers in the intermediate axial portion of the drum havingannular ports providing communication between said axial cham-vbers-,and the separating chambers.

32. In centrifugal apparatus, a rotary drum having separating chambersin the end portions of the same provided with inde# pendent concentricdischarge throats in the opposite ends ofthe drum, annular chambers 1nthe intermediate axial portion of the drum having annular portsproviding vcommunication between Said axial chambers and the separatingchambers and channels providing communication between the end separatingchambers extending about said axial chambers.

33. In centrifugal apparatus, a rotary drum having separating chambersin the end portions ,of the same provided with independent concentricdischarge tliroats in the opposite ends of the drum, annular chambers inthe intermediate axial portion of the drum having annular portsproviding communication between said axial chambers and the separatingchambers and an annular -of th'edrum in communication with theseparating chambers and flow passages providing communication betweenthe end' chambers and located. in the intermediate ortion Aof the, drumbetween the louter peripheral gischarge chamber.l and the inner axialchamers.

35. .In centrifugal apparatus, -a drum" having concentric dischargethroat in one end of the drum, an annular discharge chamber in theperipheral portion of the drum and flow passages from thesepar'atingchamber to the rotary discharge chamber, including a channelinf. `clined radially inward from the outer peripheral portion of thelseparating chamber.

36. In centrifugal apparatus, a rotary a separating chamber with a` drumhaving a separating chamber with a Y concentric discharge throat in oneend of the drum, an annular discharge chamber in the peripheral lportionof the drum, flow passages from the separating chamber to the dischargechamber, including 4a channel inclined radially inward from the outerperipheral portion of the separating cham* ber and an annular receivingchamber in the axial portion of the drum in communication with theseparating chamber. l

37. In centrifugal apparatus, a rotary drum having separatingchambersinopposite end portions of the same, shafting supporting said drum,material guides Within said chambers and differential gear sets operatedby the shafting at opposite ends of the drum for rotating said guides-in the same direction asbut at a different rate of speed from thedrinn.

. 38. In centrifugal apparatus, -a rotary drum having discharge throatsat opposite' ends of the same, means for Iwithdrawing material throughsaid throats and differential gear sets at opposite ends of the drum forrotating said 'withdrawing means at a different rate of speed than thedrum.

39. In centrifugal apparatus, a shaft, a drum mounted'onsaid shafthaving a separating chamber in one end provided with a discharge throatsurrounding the shaft, a sleeve rotatably engaged on said shaft, guidescarried by said sleeve extending into theseparatinfr chamber andinclinedfrom the peripheral portion. of the same toward the discharge throat andmeans for rotating the shaft and sleeve at different speeds to effect atravel of matter 'separated i-n the chamber along the guides tothe'discharge throat.

40. Inicentrifugal apparatus, a shaft, a drum mounted on said shafthaving a separating chamber in one end provided with a discharge'throatsurrounding the shaft, asleeve rotatably engagedon said shaft, guidescarried by said sleeve extending into the'separatino' chamber andinclined from portion of the same toward along the inclined throat.

4l. In centrifugal apparatus, a shaft,- a

guides to the discharge drum on 4said shaft having separating chambersin the opposite end- 'portlons of the` "same with discharge throats'surrounding the shaft, sleeves rotatably engaged on the shaft, guidescarried by said sleeves extending into the separating chambers andinclined fromfthe ,peripheral portions of the same toward the dischargethroats and means forrotating the' drum and the sleeves i 'atdierents'peeds.

42. In centrifugal apparatus, a sha-ft, a

\ drum on said' shaft having separating cham- .bers ini the opposite endportions of the lsame with discharge throatsv surrounding the shaft,sleeves rotatably engaged on the shaft, guides carried by said sleevesextend'- .ing into the separating Ichambers and in c lih'ed from theperipheral portions ofthe same toward the discharge throats and meansfor rotating the drum and sleeves 'in .the same direction but the drumV'at greater speed than the sleeves.

43. In centrifugal .,apparatus, arotary drum provided with separatingchambers in opposite ends of the same,said chambers having concentricdischarge throats, material withdrawing meansconcentrieally mountedWitliin 'the chambers extendingv from the peripheral portions of vsaidcham- .means sleeved upon the shaft and operating to direct material inthe drum toward the 'end discharge throats and back-gearing at theopposite ends of the shaft for drivingV the sleeves of the materialdirecting means in the same direction as the shaft but at reduced speed.

45. Incentrifugal apparatus, a'y separatingdru'm having opposed radiallyextensive Walls anda peripheral Wall defining a sepa-` rating chamber,one of the radially extenysive Walls having a discharge throat at theaxial portion of the same, a material guide within the separatingchamber shaped-'toy fit the Walls defining said chamber,` .jid

guide extending from the peripheral pon' tion toward the dischargethroat' andmeans for rotating said'guide concentrically with respect tothe drum but4 at, a lesser rate of speed. r i

'46. In centrifugal apparatus, a sha-ft, a separating drum mounted onsaid shaft and having a separating chamber provided with a concentricdischargethroat at the axialportion of 'the same, a sleeve journaled onsaid shaft, inclined blades on the sleeve fitted to the Walls of theseparating chamber and extending from the peripheral portieri thereoftoward the discharge throat anll means for driving the sleevefrom theshal'i in the same direction but at lesser speed than theshaft.`

4:7. In centrifugal 'A apparatus,- a separat* ing drum having .aseparating chamber and a-supply chamber discharging into the separatingchamber.- through an annular orifice and a separating blade rotating,rWithin the separating chamberiand having an :extension traveling in saidannular discharge orifice.y 1 l f t 48. 4Infcentrifugalapparatus,-aseparating .drum having a separating chamber -and al supply chamberdischarging into the separati-ng chamber through an annular" orifice.and a separating blade rotating Within the separating chamber'and.having an extension traveling in said annular 'discharge prince', fsaid" drum further "havi'ng a flovv` 4passage' extendingjfrom `thesepaamber and.y an.V rinclined extensionv las on the separat-ing bladeoperating in sai' flow passage.

' 49. Invoentrifugal apparatus, a separating drum having an annularseparating chamber `With an axial discharge throat 1n one end of thedrum and avflow passage at the backof said separa-ting ehamber,'

means for supplying material to the separating chamber including anannular orificey in one Wall of the separating chamber anal/"10 VILLIAMC. LAUGHLIN.

